Audit old container images in the posit-dev GHCR registry and delete them in a reviewed batch. Produces a review list of every positron-<os>* / positron-postgres-* image version older than a cutoff (default 90 days), excluding anything a live tag or multi-arch manifest still points at; the human deletes rows they want to keep, then this drives the batch delete. Use when asked to clean up, prune, or garbage-collect old GHCR packages/images.